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MSS SP-144-2013

Pressure Seal Bonnet Valves

This Standard Practice establishes construction requirements for steel and alloy valves having pressure seal bonnets in the size range of NPS 2 (DN 50) through NPS 50 (DN 1250) and Pressure Classes 600, 900, 1500, 2500, and 4500. This Standard Practice applies to gate, globe, and check valves and may be used in conjunction with other valve-specific standards; including those identified in this Standard Practice as parent valve standards

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Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. [MSS]


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